// CityRanking.java
package com.chinasoft.pollution_analysis.entity;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@AllArgsConstructor
@NoArgsConstructor
public class CityRanking {
    private String city;
    private String pollutantType;
    private Double avgConcentration;
    private Integer pollutionRank;
    private Long sampleCount;
}